#ifndef _LINES_INCLUDED#define _LINES_INCLUDEDvoid swN(double l, double w, double g, int N=1); void cwN(double r, double a, double w, double g, int N=1);  double sbendN(double d, double r, double o, double w, double g, int N=1);  double sbend_series(double d, double r, double o, double w, double s, int N=1);  #endif /* _MASK_INCLUDED */